AMSTERDAM — A Dutch court convicted six young soccer players and the father of one of the athletes of manslaughter Monday for kicking to death a volunteer linesman after a youth match last December in a brutal attack that shocked this soccer-loving nation.

Judges in Lelystad sentenced the 50-year-old father, identified only as El-Hasan D, to six years in prison. Five teenage players were given two-year sentences in youth detention for their roles in the attack and another was sentenced to a year. A seventh teen was sentenced to 30 days of detention for assault.